▎ 摘　　要

NOVELTY - Preparing graphene carbon nanotube composite material comprises granulating graphene oxide dispersion to remove solvent to obtain carrier, placing carrier in a reaction chamber, adjusting temperature of reaction chamber to first temperature, introducing metal precursor, cracking metal precursor to form metal nanoparticles on surface of carrier to obtain microspheres, adjusting temperature of reaction chamber to a second temperature, introducing a carbon source, and performing chemical vapor deposition on surface of microspheres to grow carbon nanotubes to obtain graphene-carbon nanotube composite material. The graphene oxide dispersion liquid is graphene oxide dispersion liquid of conductive particle intercalation, and the conductive particles includes carbon black, ketjen black, onion carbon and/or fullerenes. USE - The method is useful for preparing graphene carbon nanotube composite material in electrochemical energy storage, biomedicine, composite enhancement and other fields. ADVANTAGE - The material: has a sea urchin-type structure, which can well dispersed in solvents and polymers, and can better exert synergistic effect of graphene and carbon nanotubes; and has excellent comprehensive properties and has good application prospects in electrochemical energy storage, biomedicine, composite enhancement and other fields. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene carbon nano-tube composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of flow chart for preparing graphene carbon nanotube composite material (Drawing includes non-English language text).